anything in the menus to correct this, ideas?

I have a MFD12 with a DFF1 and a TM260 transducer. The system is working well with the exception that it does not give the digital depth. The fishfinder screen indicates two black slashes followed by ft in the lower left corner but never shows a depth. The data box on the main screen also does not show the numeric depth. I haven’t found anything in the menus to correct this, ideas?